<template>
  <el-table
    ref="tableRow1"
    :data="formatData"
    :max-height="tableHeight"
    :row-class-name="showRow"
    v-bind="$attrs"
    @selection-change="handleSelectionChange"
    empty-text="对不起，没有找到相关数据！"
    @sort-change="sortChange"
  >
    <el-table-column type="selection" width="55" align="center" v-if="selection"></el-table-column>
    <el-table-column v-if="columns.length === 0" width="150">
      <template slot-scope="scope">
        <span v-for="space in scope.row._level" :key="space" class="ms-tree-space" />
        <span v-if="iconShow(0, scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-caret-right" />
          <i v-else class="el-icon-caret-bottom" />
        </span>
        {{ scope.$index }}
        <!-- 项目组 -->
      </template>
    </el-table-column>
    <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width">
      <template slot-scope="scope">
        <!-- Todo -->
        <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
        <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space" />
        <span v-if="iconShow(index, scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index, scope)">
          <i v-if="!scope.row._expanded" class="el-icon-caret-right" />
          <i v-else class="el-icon-caret-bottom" />
        </span>
        {{ scope.row[column.value] }}
        <!-- 单个项目 -->
        <span v-if="showCopy">
          <!-- 复制项目名 -->
          <el-tooltip class="item" effect="dark" content="复制" placement="top">
            <el-button
              class="bar_btn copy_btn"
              size="mini"
              icon="el-icon-document-copy"
              circle
              plain
              id="copyBtn"
              :data-clipboard-text="scope.row[column.value]"
              @click="getItemName()"
            ></el-button>
          </el-tooltip>
        </span>
      </template>
    </el-table-column>
    <slot />
  </el-table>
</template>

<script>
/**
  Auth: Lei.j1ang
  Created: 2018/1/19-13:59
*/
import treeToArray from './eval';
import Clipboard from 'clipboard';
export default {
  name: 'TreeTable',
  props: {
    /* eslint-disable */
    data: {
      type: [Array, Object],
      required: true,
    },
    tableHeight: {
      type: [String, Number],
      default: undefined,
    },
    columns: {
      type: Array,
      default: () => [],
    },
    evalFunc: Function,
    evalArgs: Array,
    expandAll: {
      type: Boolean,
      default: false,
    },
    expandEvent: {
      type: Function,
      default: function () {},
    },
    selection: {
      type: Boolean,
      default: false,
    },
    showCopy: {
      type: Boolean,
      default: false,
    },
  },
  computed: {
    // 格式化数据源
    formatData: function () {
      let tmp;
      if (!Array.isArray(this.data)) {
        tmp = [this.data];
      } else {
        tmp = this.data;
      }
      const func = this.evalFunc || treeToArray;
      const args = this.evalArgs ? Array.prototype.concat([tmp, this.expandAll], this.evalArgs) : [tmp, this.expandAll];
      return func.apply(null, args);
    },
  },
  methods: {
    showRow: function (row) {
      const show = row.row.parent ? row.row.parent._expanded && row.row.parent._show : true;
      row.row._show = show;
      return show ? 'class1' : 'class2';
    },
    // 切换下级是否展开
    toggleExpanded: function (trIndex, node) {
      const record = this.formatData[trIndex];
      record._expanded = !record._expanded;
      if (record._expanded) this.$emit('load', node.row);

      // 这里放置一个定时器更新表格样式，确保产生滚动条
      setTimeout(() => {
        this.$refs.tableRow1.doLayout();
      });

      if (record._expanded) {
        this.expandEvent(record);
      }
    },
    // 图标显示
    iconShow(index, record) {
      return (index === 0 && record.children && record.children.length > 0) || record.hasChildren;
    },
    // 选择时间
    handleSelectionChange(val) {
      this.$emit('multipleSelection', val);
    },
    // 排序
    sortChange(column) {
      this.$emit('sortChange', column);
    },
    // 变体表格底色
    tableRowClassName(row, rowIndex) {
      if (row.row.parent) {
        return 'warning-row';
      }
    },
    // 复制项目名称
    getItemName() {
      var clipboard = new Clipboard('.copy_btn');
      clipboard.on('success', (e) => {
        this.$Utils.messageSuccess('复制成功');
        // 释放内存
        clipboard.destroy();
      });
      clipboard.on('error', (e) => {
        // 不支持复制
        this.$Utils.messageError('该浏览器不支持自动复制');
        // 释放内存
        clipboard.destroy();
      });
    },
  },
};
</script>
<style rel="stylesheet/css">
@keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-webkit-keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
.class1 {
  animation: treeTableShow 1s;
  -webkit-animation: treeTableShow 1s;
}
.class2 {
  display: none;
}
</style>

<style lang="scss" rel="stylesheet/scss">
$color-green: rgb(66, 161, 2) 3;
$space-width: 18px;
.ms-tree-space {
  position: relative;
  top: 1px;
  display: inline-block;
  font-style: normal;
  font-weight: 400;
  line-height: 1;
  width: $space-width;
  height: 14px;
  &::before {
    content: '';
  }
}
.processContainer {
  width: 100%;
  height: 100%;
}
table td {
  line-height: 26px;
}

.tree-ctrl {
  position: relative;
  cursor: pointer;
  color: $color-green;
  size: 10px;
  margin-left: -$space-width;
}
.el-table .warning-row {
  background-color: #e8f5ff;
}
#copyBtn {
  background: none;
  border: none;
}
#copyBtn:hover {
  background: none;
  border: none;
}
</style>
